Photographic-printing apparatus.



H. G. GOPFMAN &B. F. VAN HORNE.

PHOTOGRAPHIG PRINTING APPARATUS. APPLICATION FILED SEPT. 12, 1913.

wmomo Patented Oct. 20, 1914,

3 SHEETS SEEET 1.

J13 die I] I1 o 4 o o 4 o ---fit--;

q o o o t o a 17, a'o/f v M 12 1]? Vbrliwna 'IHE NORRIS PETERS CO.,PHOTO-LITH-L. WASHINGTON. D. L.

'H. 0. GOFFM'AN & B. P. VAN HORNE. PHOTOGRAPHIO PRINTING APPARATUS.

APPLICATION FILED SEPT. 12, 1913.

1 1 1 4, 1 1 6. v Patented 'Oct. 20, 1914,

3 SHEETS-SHEET 2 THE NORRIS FETERS c0. PHOT0LITHO,.WASHIND1Y)N D. C.

- smwanrorri fl HENRY doorrmlm AND BENJAMIN r. VAN 110mm, or GARY,INDIANA.

PHCTOGBAPHIC-PRINTING APPARATUS.

Specification of Letters Patent. Application filed September 12, 1913.Serial No. 789,579.

Patented Oct. 20, 1914.

Y To all whom it may concern.

Be it known that we, HENRY G. CorFMAN and BENJAMIN F. VAN HORNE,citizens of the United States, residing at Gary, in the county of Lake,State of Indiana, have invented certain new and useful Improvements inPhotographic-Printing Apparatus and we do hereby declare the followingto be a full, clear, and exact description of the inven- -tion,such aswill enable others skilled in the art to which it appertains to make anduse the same. i

This invention relates to photographic printing apparatus andparticularly to'that type in which an artificial light is employed toeffect theprinting."

l l Th object of he. invention resides in the provision'of an apparatusof the character named in which the artificial lights are controlledautomatically by opening and closing the hinged printing frame back,said lights being turnedon when the negative and sensi- --tized paperhave been secured under the back andextinguished I. when the back ismoved to open position to permit of the removal of the exposed paper.

' A furtherobject of the invention resides in the provision of anapparatus; of the character referred :to which includes means forelevating one end of the negative mechanically. to permitof theconvenient manpaper should be exposed to the artificial lights to effectthe proper printing.

" Withthe above and other ob ects in v1ew the invention consists in the"details of con, ,struction and in the arrangement and combination ofparts to be hereinafter more I fully described and particularly pointedout in the appended claims.

' In describing the inventiongin'detail reference will be had to theaccompanying ,j drawings wherein like characters of referencedenotecorresponding parts in thes eral views,-and 1n Wh1Ch-- disposed. insecuring relation .to a negative.

Fig. 2 a section on the line 22 of Fig. 1 with the hinged back of theprinting frame partly open. Fig. 3a plan view of the apparatus with thetop and false bottom thereof removed. Fig. 4 a bottom view of the topppf the apparatus with the printing frame disposed therein. Fig. 5 a,section on the line 55 of Fig'4. Fig. 6 a transverse section through'theapparatus. Fig. 7 a secment of the negative lifting device. 7

Referring to the drawings, the apparatus is shownas comprising a box orcasing A which includes side'members 15 and 16, a front member lfl *arear member 18,"a bottom 19, a false'bottom'20 and a removable 'top 21.The rear member 18- isprovided centrally adjacent the bottom 19-with an4 opening 22 andmountedv onthe inner face of therear member .18"at eachside of the opening 22 are blocks 23 which support a strip of insulation24. and this strip in turn carries electrical contacts 25 and 26 whicheach corner' of the "casing'is a block 28 and these blocks serve tosupport the false bot- Adapted to be detachably engaged with theelectrical contacts'25 and 26 when the door 27 isin open position isanelectrical' connection 29' which has secured thereto' wires 30 and 31leading from a suitable electrical source. Leading from the contact 25"is a wire 32 which is connected to a pivoted knife 'side' member 15.Leading "from" the conpivoted knife arm mounted upon the inner side-"ofthe side member 15 inspa'ced relationto the arm- 33 and for movement ina plane 'parallel'tothe plane of movement of said arm 33. Connected inmultiple be? tween the wires 32 and 34 is a plurality of electriclanipsockets' 86. These socketsare respectively through openings 37 inthe false bottom 20. fEach of the sockets 36 carries a lamp 38 the globeof which is of any detion on the line 77' of Fig.3. Fig. 8 a sectiononthe line 88 of Fig. 4. Fig. '9, a section on the line.99 of Fig. 4,andFig. F 10a detail perspective view of the sear ele project into theopening 22. This opening. 22 isadapted to be closed by a door 27suitablyhinged to the outer side of the rear .member' 18. Mounteduponthe bottom 19' at. 1

tom 20 in spaced relation to the bottom 19.

so I

arm-33 mounted upon the inner side of the 1 tact 26 is a wirei34 whichis connected to a mounted'upon the bottom 19 and project I siredcolor,fiit being preferred however to use a lamp with a ,red globe inthe socket am LJ nearest the rear member 18 and lamps with clear globesin the remaining sockets.

Depending from the top 21 is a knife contact 39 which receives the knifearm 33. This top 21 is provided with an opening 40 for the reception ofa printing frame B. tarried by the top 21 and extending into the opening10 is a knife contact 11 which receives the knife arm Mounted in therear end of the top 21 are spaced conducting screws 42 and d3. Thescrews project slightly into the printing frame seat at their forwardends and said forward ends are provided respectively with recesses 44c.The

screw -12 is connected at its inner end to the knife contact 39 by meansof a wire 4-5, while the inner end of the screw a3 is connected to theknife contact 11 by a wire 46.

The printing frame B includes the usual side members -17 and #18, rearmember d9 and front member 50, said members being provided along theirinner edge with a ledge 51 for supporting a negative. Hinged to the rearmember d9 is the usual printing frame back which includes an innermember 52 and an outer member 53, the latter being hingedly connected tothe free edge of the inner member 52. Mounted in the rear member 49 ofthe printing frame are spaced screw conductors 51- the inner ends ofwhich engage in the recesses 4A of the conducting screws .2 and +13respectively. The outer ends of these conducting screws 54 projectslightly over the ledge 51 and are adapted to be engaged by the innerend of respective conducting members 55 mounted in the section of thehinged back when said back is in closed position. The outer end of theconducting members 55 project slightly beyond the free edge of thesection 52 and are adapted to be connected by a contact plate 56 mountedon the inner edge of the section 53 of the hinged back, such connectionof the contact members 55 by the contact plate 56 occurring when thehinged top is in closed position as will be obvious. By thisconstruction it will be obvious that when the hinged back of theprinting frame is in partly open and open position the circuit throughthe lamps carried by the sockets 36 will be broken and that as soon asthe hinged back of the printing frame B is moved to closed position thecircuit through said lamps will be closed so as to provide the necessarylight to effect the printing of the picture. The period of exposure inthe printing operation is determined by the operator and when asufficient period has elapsed the hinged back of the printing frame ismoved to open position and the lights carried by the sockets 36extinguished.

It is often desirable to turn on the lights carried by the sockets 36without closing the hinged back of the printing frame for the purpose ofallowing the density of a negative to be inspected. In order toaccomplish this result there is mounted on the inner side of the sidemember 15 a U-shaped member 57 disposed in embracing relation to theknife arms 33 and The arms of the Ushaped member 57 are providedrespectively with recesses 58 in which are slidably mounted the ends ofa bar 59. This bar 59 is provided with a stem 60 which is slidablethrough an opening 61 in the side member 15. The bar 59 is normally heldout of engagement with the knife arms 33 and 35 by means of a spring (32which encircles the stem 60 and has one end connected to the member 51and its other end to the bar 59. The outer end of the stem 60 hasmounted thereon a push button 63 disposed on the outer side of the sidemember 15. By this construction it will be apparent that when the pushbutton 63 is operated to move the stem 60 inwardly of the side member 15the bar 59 will be brought into engagement with the knife arms 33 andand in this manner the circuit through the lamp sockets 36 will beclosed and the lamps carried by said sockets ilhnninated. As soon aspressure is relieved from the push button 63 the spring (32 will shiftthe bar 59 out of engagement with the knife arms 33 and 35. In thismanner the lights of the apparatus may be illuminated for the purpose ofinspecting the density of a negative independent of the closing of thehinged back of the printing frame 13.

Mounted on the under side of the front member 50 of a printing frame isan angle member (31 which includes a depending arm 65 the lower end ofwhich terminates in an an ular portion (36 provided with a perforation67. This arm 65 is further provided with a slot 72 for a purpose thatwill presently appear. Slidable in the perforation 67 is a plunger 69provided on the side thereof adjacent the arm 65 with a notch 71. Theplunger 69 is normally held in its uppermost position by a spring 71 andthe upper end of said plunger terminates in an angular portion whichextends over the ledge 51. Depending from the plate 64: parallel to thearm 65 is a bracket 70 upon which is pivoted a sear 72 working throughthe slot 72 and adapted to engage the notch 71 to hold the plunger 69 inits lowermost position against the influence of the spring 71. Dependingfrom the plate 6% is a bracket 73 on which is pivoted a two armed lever74. One end of this lever 7d extends under the end of the sear 72 remotefrom the arm 65 so that when the opposite end of said sear is depressedthe sear 72 will be operated so as to disengage same from the notch 71and release the plunger 69 to the influence of the spring 71. The end ofthe lever 7 1 remote from the arm 65 has pivotally connected thereto astem 75 which I carries a push button 76 movable through i an opening 79in the front member 50. A

spiral spring 80 is disposed in the opening 79 and encircles the stem 75and constantly tends to hold the stem 75 elevated as will be obvious. Bythis construction it will be apparent that when a ne ative is closed in71. At the termination of this depression of the plunger 69 the sear 7 2will engage in p i the notch71 and lock the plunger depressed during theprinting operation. When it is desired to remove the negative it is onlytrical conductors I ing, lamps conducting said conductors,

necessary to open the hinged back of the printing frame and then depressthe push button 76. This depression of the push button 76 will rock thelever 7 4 and in turn rock. the sear 72 so as to disengage the latterfrom the notch 71 when the plunger 69 will be elevated under theinfluence ofthespring 71 so as to liftth'e outer end of the negative toa position where it may be conveniently gripped and removed.

What We claim is t Y 1 In a photographic printing apparatus thecombination of a casing having a print- I ing frame receivin opening inits top, elecisposed w1th1n sald casmeans for connecting one end of saidconductors with an electrical source, a printing frame seated in theopenmg in the top of Copies of this patent may be obtained for saidcasin a hinged back included in said printing rame, means for connectingthe other ends of said conductors o erated by the movement of the hingedbacE to closed position, a slidable plate adapted for movement intoengagement with the conductors simultaneously inde endent of themovement of the hinged hack to closed position, spring means normallyholdin the plate out of engagement with the con uctors, and means formoving said'plate against the influence of said spring means.

2. Av photographic printing frame comprising a frame body having anegative supporting ledge along its inner edge, a hinged back secured tosaid frame body for confining a negative upon said ledge, a plungerslidable in the frame body and having a portion thereof overlying theledge, 4

spring means constantly tending to elevate said plunger to lift anegative thereabove, a sear for locking said plunger depressed, a pushbutton mounted in the frame body, and connections between said pushbutton and said sear whereby the depression of the former will disengagethe latter from the plunger and release same to the influence of saidspring means. I L In testimony whereof, we afiix our signatures in thepresence of two witnesses.

HENRY C. COFFMAN. BENJAMIN F. VAN'HORNE. Witnesses:

RICHARD ELWoon, CHARLES MATTOX.

five cents each, by addressing the Commissioner of Patents, 'Washington,D; 0.

